| /* | |
| 2 | * jQuery JSON Plugin |
|---|---|
| 3 | * version: 1.0 (2008-04-17) |
| 4 | * |
| 5 | * This document is licensed as free software under the terms of the |
| 6 | * MIT License: http://www.opensource.org/licenses/mit-license.php |
| 7 | * |
| 8 | * Brantley Harris technically wrote this plugin, but it is based somewhat |
| 9 | * on the JSON.org website's http://www.json.org/json2.js, which proclaims: |
| 10 | * "NO WARRANTY EXPRESSED OR IMPLIED. USE AT YOUR OWN RISK.", a sentiment that |
| 11 | * I uphold. I really just cleaned it up. |
| 12 | * |
| 13 | * It is also based heavily on MochiKit's serializeJSON, which is |
| 14 | * copywrited 2005 by Bob Ippolito. |
| 15 | */ |
| 16 | |
| 17 | (function($) { |
| 18 | function toIntegersAtLease(n) |
| 19 | // Format integers to have at least two digits. |
| 20 | { |
| 21 | return n < 10 ? '0' + n : n; |
| 22 | } |
| 23 | |
| 24 | Date.prototype.toJSON = function(date) |
| 25 | // Yes, it polutes the Date namespace, but we'll allow it here, as |
| 26 | // it's damned usefull. |
| 27 | { |
| 28 | return this.getUTCFullYear() + '-' + |
| 29 | toIntegersAtLease(this.getUTCMonth()) + '-' + |
| 30 | toIntegersAtLease(this.getUTCDate()); |
| 31 | }; |
| 32 | |
| 33 | var escapeable = /["\\\x00-\x1f\x7f-\x9f]/g; |
| 34 | var meta = { // table of character substitutions |
| 35 | '\b': '\\b', |
| 36 | '\t': '\\t', |
| 37 | '\n': '\\n', |
| 38 | '\f': '\\f', |
| 39 | '\r': '\\r', |
| 40 | '"' : '\\"', |
| 41 | '\\': '\\\\' |
| 42 | }; |
| 43 | |
| 44 | $.quoteString = function(string) |
| 45 | // Places quotes around a string, inteligently. |
| 46 | // If the string contains no control characters, no quote characters, and no |
| 47 | // backslash characters, then we can safely slap some quotes around it. |
| 48 | // Otherwise we must also replace the offending characters with safe escape |
| 49 | // sequences. |
| 50 | { |
| 51 | if (escapeable.test(string)) |
| 52 | { |
| 53 | return '"' + string.replace(escapeable, function (a) |
| 54 | { |
| 55 | var c = meta[a]; |
| 56 | if (typeof c === 'string') { |
| 57 | return c; |
| 58 | } |
| 59 | c = a.charCodeAt(); |
| 60 | return '\\u00' + Math.floor(c / 16).toString(16) + (c % 16).toString(16); |
| 61 | }) + '"'; |
| 62 | } |
| 63 | return '"' + string + '"'; |
| 64 | }; |
| 65 | |
| 66 | $.toJSON = function(o, compact) |
| 67 | { |
| 68 | var type = typeof(o); |
| 69 | |
| 70 | if (type == "undefined") |
| 71 | return "undefined"; |
| 72 | else if (type == "number" || type == "boolean") |
| 73 | return o + ""; |
| 74 | else if (o === null) |
| 75 | return "null"; |
| 76 | |
| 77 | // Is it a string? |
| 78 | if (type == "string") |
| 79 | { |
| 80 | return $.quoteString(o); |
| 81 | } |
| 82 | |
| 83 | // Does it have a .toJSON function? |
| 84 | if (type == "object" && typeof o.toJSON == "function") |
| 85 | return o.toJSON(compact); |
| 86 | |
| 87 | // Is it an array? |
| 88 | if (type != "function" && typeof(o.length) == "number") |
| 89 | { |
| 90 | var ret = []; |
| 91 | for (var i = 0; i < o.length; i++) { |
| 92 | ret.push( $.toJSON(o[i], compact) ); |
| 93 | } |
| 94 | if (compact) |
| 95 | return "[" + ret.join(",") + "]"; |
| 96 | else |
| 97 | return "[" + ret.join(", ") + "]"; |
| 98 | } |
| 99 | |
| 100 | // If it's a function, we have to warn somebody! |
| 101 | if (type == "function") { |
| 102 | throw new TypeError("Unable to convert object of type 'function' to json."); |
| 103 | } |
| 104 | |
| 105 | // It's probably an object, then. |
| 106 | var ret = []; |
| 107 | for (var k in o) { |
| 108 | var name; |
| 109 | type = typeof(k); |
| 110 | |
| 111 | if (type == "number") |
| 112 | name = '"' + k + '"'; |
| 113 | else if (type == "string") |
| 114 | name = $.quoteString(k); |
| 115 | else |
| 116 | continue; //skip non-string or number keys |
| 117 | |
| 118 | var val = $.toJSON(o[k], compact); |
| 119 | if (typeof(val) != "string") { |
| 120 | // skip non-serializable values |
| 121 | continue; |
| 122 | } |
| 123 | |
| 124 | if (compact) |
| 125 | ret.push(name + ":" + val); |
| 126 | else |
| 127 | ret.push(name + ": " + val); |
| 128 | } |
| 129 | return "{" + ret.join(", ") + "}"; |
| 130 | }; |
| 131 | |
| 132 | $.compactJSON = function(o) |
| 133 | { |
| 134 | return $.toJSON(o, true); |
| 135 | }; |
| 136 | |
| 137 | $.evalJSON = function(src) |
| 138 | // Evals JSON that we know to be safe. |
| 139 | { |
| 140 | return eval("(" + src + ")"); |
| 141 | }; |
| 142 | |
| 143 | $.secureEvalJSON = function(src) |
| 144 | // Evals JSON in a way that is *more* secure. |
| 145 | { |
| 146 | var filtered = src; |
| 147 | filtered = filtered.replace(/\\["\\\/bfnrtu]/g, '@'); |
| 148 | filtered = filtered.replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g, ']'); |
| 149 | filtered = filtered.replace(/(?:^|:|,)(?:\s*\[)+/g, ''); |
| 150 | |
| 151 | if (/^[\],:{}\s]*$/.test(filtered)) |
| 152 | return eval("(" + src + ")"); |
| 153 | else |
| 154 | throw new SyntaxError("Error parsing JSON, source is not valid."); |
| 155 | }; |
| 156 | })(jQuery); |
jQuery.json.js
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